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class="post-meta-date-updated" datetime="2024-02-02T14:52:39.089Z" title="更新于 2024-02-02 22:52:39">2024-02-02</time></span><span class="post-meta-categories"><span class="post-meta-separator">|</span><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E6%8A%80%E6%9C%AF%E6%95%99%E7%A8%8B/">技术教程</a><i class="fas fa-angle-right post-meta-separator"></i><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E6%8A%80%E6%9C%AF%E6%95%99%E7%A8%8B/mall/">mall</a><i class="fas fa-angle-right post-meta-separator"></i><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E6%8A%80%E6%9C%AF%E6%95%99%E7%A8%8B/mall/%E6%8A%80%E6%9C%AF%E8%A6%81%E7%82%B9%E7%AF%87/">技术要点篇</a></span></div><div class="meta-secondline"><span class="post-meta-separator">|</span><span class="post-meta-wordcount"><i class="far fa-file-word fa-fw post-meta-icon"></i><span 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<p>RabbitMQ 实现延迟消息的方式有两种，一种是使用 <code>死信队列</code> 实现，另一种是使用 <code>延迟插件</code> 实现。<code>死信队列</code> 实现我们以前曾经讲过，具体参考 <a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/architect/mall_arch_09.html">《mall整合RabbitMQ实现延迟消息》</a>，这次我们讲个更简单的，使用 <code>延迟插件</code> 实现。</p>
</blockquote>
<h2 id="学前准备"><a href="#学前准备" class="headerlink" title="#学前准备"></a><a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/technology/rabbitmq_delay.html#%E5%AD%A6%E5%89%8D%E5%87%86%E5%A4%87">#</a>学前准备</h2><p>学习本文需要对RabbitMQ有所了解，还不了解的朋友可以看下：<a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/reference/rabbitmq_start.html">《花了3天总结的RabbitMQ实用技巧，有点东西！》</a></p>
<h2 id="插件安装"><a href="#插件安装" class="headerlink" title="#插件安装"></a><a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/technology/rabbitmq_delay.html#%E6%8F%92%E4%BB%B6%E5%AE%89%E8%A3%85">#</a>插件安装</h2><blockquote>
<p>首先我们需要下载并安装RabbitMQ的延迟插件。</p>
</blockquote>
<ul>
<li><p>去RabbitMQ的官网下载插件，插件地址：<a target="_blank" rel="noopener" href="https://www.rabbitmq.com/community-plugins.html">https://www.rabbitmq.com/community-plugins.html</a></p>
</li>
<li><p>直接搜索<code>rabbitmq_delayed_message_exchange</code>即可找到我们需要下载的插件，下载和RabbitMQ配套的版本，不要弄错；</p>
</li>
</ul>
<p><img src="https://qiniu.ko25891wan.top/%E6%97%A5%E8%AE%B0%E8%BD%AF%E4%BB%B6/obsition/2024-02-02_22:52:34_rabbitmq_delay_01-dc79c3b6.png"></p>
<ul>
<li>将插件文件复制到RabbitMQ安装目录的<code>plugins</code>目录下；</li>
</ul>
<p><img src="https://qiniu.ko25891wan.top/%E6%97%A5%E8%AE%B0%E8%BD%AF%E4%BB%B6/obsition/2024-02-02_22:52:34_rabbitmq_delay_02-bfcf2a84.png"></p>
<ul>
<li>进入RabbitMQ安装目录的<code>sbin</code>目录下，使用如下命令启用延迟插件；</li>
</ul>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">rabbitmq-plugins enable rabbitmq_delayed_message_exchange</span><br></pre></td></tr></table></figure>

<ul>
<li>启用插件成功后就可以看到如下信息，之后重新启动RabbitMQ服务即可。</li>
</ul>
<p><img src=""></p>
<h2 id="实现延迟消息"><a href="#实现延迟消息" class="headerlink" title="#实现延迟消息"></a><a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/technology/rabbitmq_delay.html#%E5%AE%9E%E7%8E%B0%E5%BB%B6%E8%BF%9F%E6%B6%88%E6%81%AF">#</a>实现延迟消息</h2><blockquote>
<p>接下来我们需要在SpringBoot中实现延迟消息功能，这次依然沿用商品下单的场景。比如说有个用户下单了，他60分钟不支付订单，订单就会被取消，这就是一个典型的延迟消息使用场景。</p>
</blockquote>
<ul>
<li>首先我们需要在<code>pom.xml</code>文件中添加<code>AMQP</code>相关依赖；</li>
</ul>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">&lt;!--消息队列相关依赖--&gt;</span><br><span class="line">&lt;dependency&gt;</span><br><span class="line">    &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;</span><br><span class="line">    &lt;artifactId&gt;spring-boot-starter-amqp&lt;/artifactId&gt;</span><br><span class="line">&lt;/dependency&gt;</span><br></pre></td></tr></table></figure>

<ul>
<li>之后在<code>application.yml</code>添加RabbitMQ的相关配置；</li>
</ul>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">spring:</span><br><span class="line">  rabbitmq:</span><br><span class="line">    host: localhost # rabbitmq的连接地址</span><br><span class="line">    port: 5672 # rabbitmq的连接端口号</span><br><span class="line">    virtual-host: /mall # rabbitmq的虚拟host</span><br><span class="line">    username: mall # rabbitmq的用户名</span><br><span class="line">    password: mall # rabbitmq的密码</span><br><span class="line">    publisher-confirms: true #如果对异步消息需要回调必须设置为true</span><br></pre></td></tr></table></figure>

<ul>
<li>接下来创建RabbitMQ的Java配置，主要用于配置交换机、队列和绑定关系；</li>
</ul>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br></pre></td><td class="code"><pre><span class="line">/**</span><br><span class="line"> * 消息队列配置</span><br><span class="line"> * Created by macro on 2018/9/14.</span><br><span class="line"> */</span><br><span class="line">@Configuration</span><br><span class="line">public class RabbitMqConfig &#123;</span><br><span class="line"></span><br><span class="line">    /**</span><br><span class="line">     * 订单延迟插件消息队列所绑定的交换机</span><br><span class="line">     */</span><br><span class="line">    @Bean</span><br><span class="line">    CustomExchange  orderPluginDirect() &#123;</span><br><span class="line">        //创建一个自定义交换机，可以发送延迟消息</span><br><span class="line">        Map&lt;String, Object&gt; args = new HashMap&lt;&gt;();</span><br><span class="line">        args.put(&quot;x-delayed-type&quot;, &quot;direct&quot;);</span><br><span class="line">        return new CustomExchange(QueueEnum.QUEUE_ORDER_PLUGIN_CANCEL.getExchange(), &quot;x-delayed-message&quot;,true, false,args);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    /**</span><br><span class="line">     * 订单延迟插件队列</span><br><span class="line">     */</span><br><span class="line">    @Bean</span><br><span class="line">    public Queue orderPluginQueue() &#123;</span><br><span class="line">        return new Queue(QueueEnum.QUEUE_ORDER_PLUGIN_CANCEL.getName());</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    /**</span><br><span class="line">     * 将订单延迟插件队列绑定到交换机</span><br><span class="line">     */</span><br><span class="line">    @Bean</span><br><span class="line">    public Binding orderPluginBinding(CustomExchange orderPluginDirect,Queue orderPluginQueue) &#123;</span><br><span class="line">        return BindingBuilder</span><br><span class="line">                .bind(orderPluginQueue)</span><br><span class="line">                .to(orderPluginDirect)</span><br><span class="line">                .with(QueueEnum.QUEUE_ORDER_PLUGIN_CANCEL.getRouteKey())</span><br><span class="line">                .noargs();</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<ul>
<li>创建一个取消订单消息的发出者，通过给消息设置<code>x-delay</code>头来设置消息从交换机发送到队列的延迟时间；</li>
</ul>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line">/**</span><br><span class="line"> * 取消订单消息的发出者</span><br><span class="line"> * Created by macro on 2018/9/14.</span><br><span class="line"> */</span><br><span class="line">@Component</span><br><span class="line">public class CancelOrderSender &#123;</span><br><span class="line">    private static Logger LOGGER =LoggerFactory.getLogger(CancelOrderSender.class);</span><br><span class="line">    @Autowired</span><br><span class="line">    private AmqpTemplate amqpTemplate;</span><br><span class="line"></span><br><span class="line">    public void sendMessage(Long orderId,final long delayTimes)&#123;</span><br><span class="line">        //给延迟队列发送消息</span><br><span class="line">        amqpTemplate.convertAndSend(QueueEnum.QUEUE_ORDER_PLUGIN_CANCEL.getExchange(), QueueEnum.QUEUE_ORDER_PLUGIN_CANCEL.getRouteKey(), orderId, new MessagePostProcessor() &#123;</span><br><span class="line">            @Override</span><br><span class="line">            public Message postProcessMessage(Message message) throws AmqpException &#123;</span><br><span class="line">                //给消息设置延迟毫秒值</span><br><span class="line">                message.getMessageProperties().setHeader(&quot;x-delay&quot;,delayTimes);</span><br><span class="line">                return message;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;);</span><br><span class="line">        LOGGER.info(&quot;send delay message orderId:&#123;&#125;&quot;,orderId);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<ul>
<li>创建一个取消订单消息的接收者，用于处理订单延迟插件队列中的消息。</li>
</ul>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line">/**</span><br><span class="line"> * 取消订单消息的处理者</span><br><span class="line"> * Created by macro on 2018/9/14.</span><br><span class="line"> */</span><br><span class="line">@Component</span><br><span class="line">@RabbitListener(queues = &quot;mall.order.cancel.plugin&quot;)</span><br><span class="line">public class CancelOrderReceiver &#123;</span><br><span class="line">    private static Logger LOGGER =LoggerFactory.getLogger(CancelOrderReceiver.class);</span><br><span class="line">    @Autowired</span><br><span class="line">    private OmsPortalOrderService portalOrderService;</span><br><span class="line">    @RabbitHandler</span><br><span class="line">    public void handle(Long orderId)&#123;</span><br><span class="line">        LOGGER.info(&quot;receive delay message orderId:&#123;&#125;&quot;,orderId);</span><br><span class="line">        portalOrderService.cancelOrder(orderId);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<ul>
<li>然后在我们的订单业务实现类中添加如下逻辑，当下单成功之前，往消息队列中发送一个取消订单的延迟消息，这样如果订单没有被支付的话，就能取消订单了；</li>
</ul>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br></pre></td><td class="code"><pre><span class="line">/**</span><br><span class="line"> * 前台订单管理Service</span><br><span class="line"> * Created by macro on 2018/8/30.</span><br><span class="line"> */</span><br><span class="line">@Service</span><br><span class="line">public class OmsPortalOrderServiceImpl implements OmsPortalOrderService &#123;</span><br><span class="line">    private static Logger LOGGER = LoggerFactory.getLogger(OmsPortalOrderServiceImpl.class);</span><br><span class="line">    @Autowired</span><br><span class="line">    private CancelOrderSender cancelOrderSender;</span><br><span class="line"></span><br><span class="line">    @Override</span><br><span class="line">    public CommonResult generateOrder(OrderParam orderParam) &#123;</span><br><span class="line">        //todo 执行一系类下单操作，具体参考mall项目</span><br><span class="line">        LOGGER.info(&quot;process generateOrder&quot;);</span><br><span class="line">        //下单完成后开启一个延迟消息，用于当用户没有付款时取消订单（orderId应该在下单后生成）</span><br><span class="line">        sendDelayMessageCancelOrder(11L);</span><br><span class="line">        return CommonResult.success(null, &quot;下单成功&quot;);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    @Override</span><br><span class="line">    public void cancelOrder(Long orderId) &#123;</span><br><span class="line">        //todo 执行一系类取消订单操作，具体参考mall项目</span><br><span class="line">        LOGGER.info(&quot;process cancelOrder orderId:&#123;&#125;&quot;,orderId);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    private void sendDelayMessageCancelOrder(Long orderId) &#123;</span><br><span class="line">        //获取订单超时时间，假设为60分钟(测试用的30秒)</span><br><span class="line">        long delayTimes = 30 * 1000;</span><br><span class="line">        //发送延迟消息</span><br><span class="line">        cancelOrderSender.sendMessage(orderId, delayTimes);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<ul>
<li>启动项目后，在Swagger中调用下单接口；</li>
</ul>
<p><img src="https://qiniu.ko25891wan.top/%E6%97%A5%E8%AE%B0%E8%BD%AF%E4%BB%B6/obsition/2024-02-02_22:52:34_rabbitmq_delay_04-98f8ae7d.png"></p>
<ul>
<li>调用完成后查看控制台日志可以发现，从消息发送和消息接收处理正好相差了<code>30s</code>，我们设置的延迟时间。</li>
</ul>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">2020-06-08 13:46:01.474  INFO 1644 --- [nio-8080-exec-1] c.m.m.t.s.i.OmsPortalOrderServiceImpl    : process generateOrder</span><br><span class="line">2020-06-08 13:46:01.482  INFO 1644 --- [nio-8080-exec-1] c.m.m.tiny.component.CancelOrderSender   : send delay message orderId:11</span><br><span class="line">2020-06-08 13:46:31.517  INFO 1644 --- [cTaskExecutor-4] c.m.m.t.component.CancelOrderReceiver    : receive delay message orderId:11</span><br><span class="line">2020-06-08 13:46:31.520  INFO 1644 --- [cTaskExecutor-4] c.m.m.t.s.i.OmsPortalOrderServiceImpl    : process cancelOrder orderId:11</span><br></pre></td></tr></table></figure>

<h2 id="两种实现方式对比"><a href="#两种实现方式对比" class="headerlink" title="#两种实现方式对比"></a><a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/technology/rabbitmq_delay.html#%E4%B8%A4%E7%A7%8D%E5%AE%9E%E7%8E%B0%E6%96%B9%E5%BC%8F%E5%AF%B9%E6%AF%94">#</a>两种实现方式对比</h2><blockquote>
<p>我们之前使用过死信队列的方式，这里我们把两种方式做个对比，先来聊下这两种方式的实现原理。</p>
</blockquote>
<h3 id="死信队列"><a href="#死信队列" class="headerlink" title="#死信队列"></a><a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/technology/rabbitmq_delay.html#%E6%AD%BB%E4%BF%A1%E9%98%9F%E5%88%97">#</a>死信队列</h3><p>死信队列是这样一个队列，如果消息发送到该队列并超过了设置的时间，就会被转发到设置好的处理超时消息的队列当中去，利用该特性可以实现延迟消息。</p>
<h3 id="延迟插件"><a href="#延迟插件" class="headerlink" title="#延迟插件"></a><a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/technology/rabbitmq_delay.html#%E5%BB%B6%E8%BF%9F%E6%8F%92%E4%BB%B6">#</a>延迟插件</h3><p>通过安装插件，自定义交换机，让交换机拥有延迟发送消息的能力，从而实现延迟消息。</p>
<h3 id="结论"><a href="#结论" class="headerlink" title="#结论"></a><a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/technology/rabbitmq_delay.html#%E7%BB%93%E8%AE%BA">#</a>结论</h3><p>由于死信队列方式需要创建两个交换机（死信队列交换机+处理队列交换机）、两个队列（死信队列+处理队列），而延迟插件方式只需创建一个交换机和一个队列，所以后者使用起来更简单。</p>
<h2 id="项目源码地址"><a href="#项目源码地址" class="headerlink" title="#项目源码地址"></a><a target="_blank" rel="noopener" href="https://www.macrozheng.com/mall/technology/rabbitmq_delay.html#%E9%A1%B9%E7%9B%AE%E6%BA%90%E7%A0%81%E5%9C%B0%E5%9D%80">#</a>项目源码地址</h2><p><a target="_blank" rel="noopener" href="https://github.com/macrozheng/mall-learning/tree/master/mall-tiny-delay">https://github.com/macrozheng/mall-learning/tree/master/mall-tiny-delay</a></p>
</article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta"><i class="fas fa-circle-user fa-fw"></i>文章作者: </span><span class="post-copyright-info"><a href="https://ko25891wan.gitlab.io">十一星野</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta"><i class="fas fa-square-arrow-up-right fa-fw"></i>文章链接: </span><span class="post-copyright-info"><a href="https://ko25891wan.gitlab.io/2024/01/b323e22f1028.html">https://ko25891wan.gitlab.io/2024/01/b323e22f1028.html</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta"><i class="fas fa-circle-exclamation fa-fw"></i>版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="https://ko25891wan.gitlab.io" target="_blank">小小程序员</a>！</span></div></div><div class="tag_share"><div class="post-meta__tag-list"></div><div 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class="toc-link" href="#%E5%AE%9E%E7%8E%B0%E5%BB%B6%E8%BF%9F%E6%B6%88%E6%81%AF"><span class="toc-number">3.</span> <span class="toc-text">实现延迟消息</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%B8%A4%E7%A7%8D%E5%AE%9E%E7%8E%B0%E6%96%B9%E5%BC%8F%E5%AF%B9%E6%AF%94"><span class="toc-number">4.</span> <span class="toc-text">两种实现方式对比</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#%E6%AD%BB%E4%BF%A1%E9%98%9F%E5%88%97"><span class="toc-number">4.1.</span> <span class="toc-text">死信队列</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%BB%B6%E8%BF%9F%E6%8F%92%E4%BB%B6"><span class="toc-number">4.2.</span> <span class="toc-text">延迟插件</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E7%BB%93%E8%AE%BA"><span class="toc-number">4.3.</span> <span class="toc-text">结论</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E9%A1%B9%E7%9B%AE%E6%BA%90%E7%A0%81%E5%9C%B0%E5%9D%80"><span class="toc-number">5.</span> <span class="toc-text">项目源码地址</span></a></li></ol></div></div><div class="card-widget card-recent-post"><div class="item-headline"><i class="fas fa-history"></i><span>最新文章</span></div><div class="aside-list"><div class="aside-list-item no-cover"><div class="content"><a class="title" href="/2024/02/c60470b9a892.html" title="Java集合使用注意事项总结">Java集合使用注意事项总结</a><time datetime="2024-02-03T04:58:22.000Z" title="发表于 2024-02-03 12:58:22">2024-02-03</time></div></div><div class="aside-list-item no-cover"><div class="content"><a class="title" href="/2024/02/81fb7a201f29.html" title="无题">无题</a><time datetime="2024-02-03T03:15:31.812Z" title="发表于 2024-02-03 11:15:31">2024-02-03</time></div></div><div class="aside-list-item no-cover"><div class="content"><a class="title" href="/2024/01/5737c1ec69a9.html" title="Wed Jan 17 2024 00:00:00 GMT+0800 (中国标准时间)">Wed Jan 17 2024 00:00:00 GMT+0800 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